Significant coal resources situated in open-pit recovered sides and bottom being non-demanded are considered to be irretrievably lost and written off as losses. Integrated (open and underground) technologies for final extraction of contour reserves applying a highwall miner complex and mobile mechanical equipment which improve coal recovery ratio are introduced in the article.
A combined opencast-to-underground mining method is widely used for final extraction of border zone coal reserves and extracting areas with limited and non-technological reserves. The idea of the method is that coal is extracted by opencast method and continued by underground mining using highwall mining complex, mobile mining mechanical equipment, augers, mechanized complexes and water jetting facilities.
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